Universal fairs

Abstract

Universal knife, with a housing (1) having a working space (11) and a storage space (12); a blade carrier (2) which is movably accommodated in the working space (11) for positioning a blade (71); a blade magazine (3) which is inserted into the storage space (12) and has a storage section (32) and a pull section (31) which are connected to one another, wherein the storage section (32) is used to store at least one spare blade (72), wherein the pull section (31) protrudes from the housing (1) and can be actuated from the outside; and a locking mechanism (4) comprising a base (41), a movable element (42), a first locking portion, and a second locking portion, the base (41) being provided on the housing (1), the movable element (42) being arranged on the base (41) and being movable between a locked position and an unlocked position, the first locking portion being provided on the movable element (42) to enable movement therewith, the second locking portion being provided on the blade magazine (3), and one of the first locking portion and the second locking portion being a locking recess (34) and the other being a locking projection (46) which can be releasably engaged in the locking recess (34); wherein, when the movable element (42) is in the locked position, the locking projection (46) engages in the locking recess (34), whereby the blade magazine (3) cannot be separated from the housing (1), and when the movable element (42) is in the unlocked position, the locking projection (46) leaves the locking recess (34), whereby the blade magazine (3) can be separated from the housing (1).

Description

Technical TransitThe invention relates to a universal knife.Prior ArtUniversal knives, also known as pocket knives, general purpose knives and cutter, have a shape suitable for single hand gripping and are commonly used for cutting thin materials such as cutting paper, adhesive tape, cloth, etc. It is often found in processing mills and stores as disclosed in Taiwanese Patents TW I309197 B and TW M478597 U, U.S. Patents TW I309197 B and TW M478597 U.However, the blade magazine for storing spare blades of the above-mentioned universal knife has defects in use. For example, the blade magazine of Taiwanese Patent I 309197 is rotatably formed. Since the grip is too small, the blade magazine cannot be easily opened with fingers. The blade magazine of Taiwanese Patent TW I309197B is press-fitted to the housing. It often accidentally falls out and is thus worn out because the press fit is not reliable. U.S. Pat. No. 2003 0 037 444 A1 has a multiplicity of opening arrangements. However, there are problems such as easy opening of the rotary lid and easy dropping of the blade. U.S. Pat. No. 2007 0 074 402 A1 has the problem that the cover is easily lost.US 2006 / 0010694 A1 discloses a knife assembly comprising a handle, a blade magazine mounted detachably in the handle and a plurality of blades mounted in the blade magazine. Thus, the blade magazine can be easily and quickly released from the handle, whereby the user can more easily replace the blades contained in the blade magazine. Moreover, the blade magazine can be easily and conveniently mounted on the handle, whereby the user can more easily mount the blade magazine. In addition, the blade magazine contains a plurality of blades, whereby the user can more easily wear the blades.US 9,205,569 B2 discloses a cutting device comprising a housing having a blade support configured to support a blade and a handle connected to the housing via an engagement interface configured such that a user of the cutting device can selectively mate the housing and handle in a plurality of different cutting device configurations, the engagement interface comprising a coupling configured to allow the housing and handle to be positioned further apart from each other in a housing and handle reconfiguration mode in which the coupling allows the handle to be repositioned rotatably relative to the housing or vice versa while substantially limiting longitudinal movement of the housing relative to the handle.FR 2 851 740 A3 describes an adjustable-handle artificial knife comprising a straight handle in combination with a first and a second half and a head rotatably mounted by the straight handle and having at its front end a blade and at its rear end a ring fitted on a tubular projection of the first half. The ring has an edge in which a plurality of pairs of recesses are symmetrically formed. A positioning member is disposed in the tubular projection and is urged by a spring to determine the movement of the head.Therefore, it is necessary to provide a new and advanced universal knife in order to solve the above problems.Object of the InventionIt is an object of the present invention to provide a universal mower which can be locked by a locking mechanism whereby the blade magazine is reliably connected to the housing to store the spare blade, the blade magazine being easily connected to and disconnected from the housing so as to meet the requirement for rapid use.This object is achieved by the universal knife according to the invention, comprising a housing having a working space and a storage space; a blade carrier movably accommodated in the working space for positioning a blade; a blade magazine inserted into the storage space and having a storage portion and a pulling portion which are connected to one another, wherein the storage portion is used for storing at least one replacement blade, wherein the pulling portion protrudes from the housing and can be operated from outside; and a locking mechanism comprising a base, a movable member, a first locking portion and a second locking portion, the base being provided on the housing, the movable member being arranged on the base and being movable between a locked position and an unlocked position, the first locking portion being provided on the movable member to allow co-movement, the second locking portion being provided on the blade magazine, and the first locking portion or the second locking portion being a locking recess and the other being a locking protrusion which is releasably lockable in the locking recess; wherein, when the movable member is in the locked position, the engaging protrusion is engaged with the engaging recess, whereby the blade magazine cannot be separated from the housing, and when the movable member is in the unlocked position, the engaging protrusion leaves the engaging recess, whereby the blade magazine can be separated from the housing.Brief Description of the DrawingsFIGS. 1 and 2 are perspective views of the embodiment of the invention, FIG. 3 is an exploded view of the embodiment of the invention, FIGS. 4 and 5 are perspective views of the blade magazine of the embodiment of the invention, FIG. 6 is an enlarged view of the embodiment of the invention, FIGS. 7 and 8 are sectional views showing the movement of the lock mechanism of the embodiment of the invention, FIGS. 9 and 10 are views showing the movement of the blade carrier of the embodiment of the invention, FIGS. 11 and 12 are views showing the movement of the blade change button of the embodiment of the invention.WAYS OF CARRYING OUT THE INVENTIONThe following embodiments are only for illustrating the present invention and should not limit the scope of the present invention.Figs. 1 to 12 show an embodiment of the present invention. The universal knife of the present invention comprises a housing 1, a blade carrier 2, a blade magazine 3 and a locking mechanism 4.The housing 1 surrounds a working space 11 and a storage space 12, and the blade carrier 2 is accommodated movably in the working space 11 for positioning a blade 71. The blade magazine 3 is inserted into the storage space 12. In detail, the blade magazine 3 has a storage portion 32 and a drawing portion 31 which are connected to each other. The stock section 32 is used to store at least one replacement blade 72. The pull portion 31 protrudes from the housing 1 and can be operated from the outside. In detail, the lock mechanism 4 includes a base 41, a movable member 42, a first latching portion, and a second latching portion. The base 41 is provided on the housing 1. The movable member 42 is disposed on the base 41 and is movable between a locked position and an unlocked position. The first latching portion is provided on the movable element 42 in order to enable a co-movement. The second latching portion is provided on the blade magazine 3. The first latching portion or the second latching portion is a latching recess 34 and the other is a latching protrusion 46 which can releasably latch into the latching recess 34. When the movable member 42 is in the locked position, the locking protrusion 46 locks into the locking recess 34, whereby the blade magazine 3 cannot be separated from the housing 1. When the movable member 42 is in the unlocked position, the locking protrusion 46 leaves the locking recess 34, whereby the blade magazine 3 can be separated from the housing 1.Preferably, the locking mechanism 4 further includes an elastic member 48. the elastic member 48 is disposed between the housing 1 and the movable member 42 to maintain the movable member 42 in the locked position in the normal state. The blade magazine 3 can thus reliably resist the unexpected external force and be normally held in the locked position.In the present embodiment, the first engaging portion is an engaging protrusion 46 and the second engaging portion is an engaging recess 34. the engaging protrusion 46 has a hook shape and forms a first inclined surface 47. a second inclined surface 35 facing the first inclined surface 47 is formed on the wall of the engaging recess 34. When the blade magazine 3 is externally inserted into the storage space 12 and moved toward the base 41, the first inclined surface 47 and the second inclined surface 35 slide against each other, thereby moving the movable member 42 toward the unlocked position. The elastic element 48 allows resetting, so that automatic locking can be carried out. The movable member 42 is slidably fitted around the base 41. The sliding direction of the movable member 42 is transverse to the drawing direction of the blade magazine 3.More specifically, the movable member 42 includes a sleeve portion 43 and two arms 44. The sleeve portion 43 is inserted to the base 41. The two arms 44 are spaced apart and connected at one end to the sleeve portion 43. The other ends of the two arms 44 clamp the latching protrusion 46, whereby the two arms 44 and the latching protrusion 46 together define a plug space 45. Two connecting claws 49 of the movable member 42 are passed through the housing 1 and connected to a push button 51. The two connecting claws 49 are connected to the sleeve portion 43. The push button 51 can be pressed from the outside and can trigger a quick unlocking by the pressure. In addition, the blade magazine 3 includes a plug portion 33. the plug portion 33 and the pull portion 31 are located at two opposite ends of the blade magazine 3. The side of the plug-in portion 33 facing away from the pull portion 31 is provided with the second inclined surface 35. The plug-in portion 33 can be selectively plugged into the plug-in space 45 so that the latching projection 46 latches into the latching recess 34. The fitting of the fitting space 45 and the fitting portion 33 can increase the accuracy of the fitting and has a guiding function for the fitting.In particular, the storage section 32 is located at the end of the blade magazine 3 facing away from the pulling section 31. The storage portion 32 is open on the side facing away from the pulling portion 31 and forms a notch 37. When the plug portion 33 is inserted into the plug space 45, an arm 44 engages the notch 37 and thus extends into the storage portion 32 to define the at least one replacement blade 72. In this way, the positional stability of the at least one replacement blade 72 and the stability of the plug connection of the blade carrier 2 to the housing 1 can be increased.Preferably, the blade magazine 3 further comprises a pressing portion 36. a part of the pressing portion 36 extends into the storing portion 32 for pressing and positioning the at least one spare blade 72 so that the at least one spare blade 72 can be firmly positioned and has a better synchronizing movement. In the present embodiment, the pressing portion 36 is a plate having elastic deformation capability to facilitate insertion or extraction of the at least one spare blade 72.Preferably, the pull portion 31 is provided with at least one grip recess 311. The at least one grip recess 311 allows the fingers to move the pulling portion 31. In the present embodiment, the number of the at least one grip recess 311 is two. The two grip recesses 311 are provided on two opposite sides of the pulling portion 31.Preferably, the housing 1 further comprises a concave portion 13. The recessed direction of the concave portion 13 is transverse to the recessed direction of the grip recess 311. The concave portion 13 is connected to the grip recess 311 to provide more space for the fingers.The universal knife further comprises a blade change button 52 The blade change button 52 is arranged on the housing 1 movably in a first direction 6. The blade support 2 has a deformation portion 21. The deformation portion 21 can be elastically deformed along the first direction 6. The deformation portion 21 includes a positioning portion 211 and a releasing portion 212. The positioning portion 211 is used for latching and positioning the blade 71. The release portion 212 is used to limit the blade 71. The blade carrier 2 can be moved transversely to the first direction 6 to a predetermined position. When the blade support 2 is at this predetermined position, the releasing portion 212 is located on the moving path of the blade change button 52, and the blade change button 52 can be pushed from the outside, thereby pushing the releasing portion 212 to deform the deforming portion 21. As a result, the positioning portion 211 leaves the blade 71. Therefore, the user can pull out, change, or turn over the blade 71.List of reference characters1 Housing 11 Working space 12 Storage space 13 Concave portion 2 Blade carrier 21 Deformation portion 211 Positioning portion 212 Release portion 3 Blade magazine 31 Drawing portion 311 Grip recess 32 Storage portion 33 Fitting portion 34 Locking recess 35 Second inclined surface 36 Pressing portion 37 Notch 4 Locking mechanism 41 Base 42 Movable member 43 Sleeve portion 44 Arm 45 Fitting space 46 Locking protrusion 47 First inclined surface 48 Elastic member 49 Connecting claw 51 Push button 52 Blade change button 6 First direction 71 Blade 72 Replacement blade

Claims

A universal knife comprising: a housing (1) having a working space (11) and a storage space (12); a blade support (2) movably accommodated in the working space (11) for positioning a blade (71); a blade magazine (3) inserted into the storage space (12) and having a storage portion (32) and a pulling portion (31) connected to each other, the storage portion (32) being used for storing at least one spare blade (72), the pulling portion (31) protruding from the housing (1) and being operable from the outside; and a locking mechanism (4) comprising a base (41), a movable member (42), a first locking portion and a second locking portion, the base (41) being provided on the housing (1), the movable member (42) being arranged on the base (41) and being movable between a locked position and an unlocked position, the first locking portion being provided on the movable member (42) to allow co-movement, the second locking portion being provided on the blade magazine (3), and the first locking portion or the second locking portion being a locking recess (34) and the other being a locking protrusion (46) which is releasably lockable in the locking recess (34); wherein, when the movable member (42) is in the locked position, the engaging protrusion (46) is engaged with the engaging recess (34), whereby the blade magazine (3) cannot be separated from the housing (1), and when the movable member (42) is in the unlocked position, the engaging protrusion (46) leaves the engaging recess (34), whereby the blade magazine (3) can be separated from the housing (1).Universal knife according to claim 1, characterized in that the movable element (42) is slidably laid around the base (41), the sliding direction of the movable element (42) being transverse to the drawing direction of the blade magazine (3).Universal knife according to claim 1, characterized in that the locking mechanism (4) further comprises an elastic element (48), wherein the elastic element (48) is arranged between the housing (1) and the movable element (42), so that the movable element (42) is normally maintained in the locked position.The universal knife according to claim 3, characterized in that the locking protrusion has a hook shape and forms a first inclined surface (47), a second inclined surface (35) facing the first inclined surface (47) being formed on the wall of the locking recess (34), wherein when the blade magazine (3) is inserted from the outside into the storage space (12) and moved toward the base (41), the first inclined surface (47) and the second inclined surface (35) slide against each other, thereby moving the movable member (42) toward the unlocked position.The universal knife according to claim 1, characterized in that the pulling portion (31) is closed with at least one grip recess (311), the at least one grip recess (311) allowing the fingers to move the pulling portion (31).The universal knife according to claim 5, characterized in that the housing (1) further comprises a concave portion (13), wherein the recessed direction of the concave portion (13) is oriented transversely to the recessed direction of the handle recess (311), and wherein the concave portion (13) is connected to the handle recess (311).Universal knife according to claim 1, characterized bya blade change knob (52) arranged on the housing (1) movably in a first direction (6), wherein the blade carrier (2) has a deformation section (21), wherein the deformation section (21) can be elastically deformed along the first direction (6), wherein the deformation section (21) includes a positioning section (211) and a release section (212), wherein the positioning section (211) is used for latching and positioning the blade (71), wherein the release section (212) is used to delimit the blade (71), wherein the blade carrier (2) can be moved transversely to the first direction (6) to a predetermined position, wherein when the blade carrier (2) is in this predetermined position, the releasing portion (212) is located on the moving path of the blade changing knob (52), wherein the blade changing knob (52) can be pushed from outside, thereby pushing the releasing portion (212), so that the deforming portion (21) is deformed, and the positioning portion (211) thus leaves the blade (71).Universal knife according to one of claims 1 to 7, characterised in that the blade magazine (3) further comprises a pressing section (36), wherein a part of the pressing section (36) extends into the storage section (32) for pressing and positioning the at least one replacement blade (72).Universal knife according to claim 8, characterised in that the pressure section (36) is a metal sheet with elastic deformation capability.Universal knife according to claim 4, characterized in that the movable element (42) is slidably laid around the base (41), wherein the sliding direction of the movable element (42) is transverse to the drawing direction of the blade magazine (3); that the drawing portion (31) is provided with at least one grip recess (311), wherein the at least one grip recess (311) allows the fingers to move the drawing portion (31); that the housing (1) further comprises a concave portion (13), wherein the recessed direction of the concave portion (13) is oriented transverse to the recessed direction of the grip recess (311), and wherein the concave portion (13) is connected to the grip recess (311); that a blade change knob (52) is arranged movably in a first direction (6), wherein the blade carrier (2) comprises a deforming portion (21), wherein the deforming portion (21) can be elastically deformed along the first direction (6), wherein the deforming portion (21) comprises a positioning portion (211) and a releasing portion (212), wherein the positioning portion (211) is used for latching and positioning the blade (71), wherein the releasing portion (212) is usable to delimit the blade (71), wherein the blade carrier (2) can be moved transversely to the first direction (6) to a predetermined position, wherein when the blade carrier (2) is in this predetermined position the releasing portion (212) lies on the movement path of the blade change knob (52), wherein the blade change knob (52) can be pressed from the outside, whereby the releasing portion (212) can be pressed, such that the deforming portion (21) is deformed and the positioning portion (211) thus leaves the blade (71); that the blade magazine (3) further comprises a pressing portion (36), a part of the pressing portion (36) extending into the storing portion (32) for pressing and positioning the at least one replacement blade (72); that the pressing portion (36) is a sheet with elastic deformability; that two connecting claws (49) of the movable element (42) are passed through the housing (1) and connected to a push button (51), the two connecting claws (49) being connected to the sleeve portion (43), wherein the push button (51) can be pressed from the outside; that the first latching portion is a latching protrusion (46) and the second latching portion is a latching recess (34); the movable element (42) having a sleeve portion (43) and two arms (44), the sleeve portion (43) being pluggable to the base (41), the two arms (44) being spaced apart and connected at one end to the sleeve portion (43), the other ends of the two arms (44) clamping the latching protrusion (46), whereby the two arms (44) and the latching protrusion (46) together define a mating space (45); the blade magazine (3) includes a plug portion (33), the plug portion (33) and the pull portion (31) being located at two opposite ends of the blade magazine (3), the locking recess (34) being formed on the plug portion (33), the side of the plug portion (33) facing away from the pull portion (31) being provided with the second inclined surface (35), the plug portion (33) being selectively insertable into the insertion space (45) so that the locking projection (46) locks into the locking recess (34); the storage portion (32) being located at the end of the blade magazine (3) facing away from the pulling portion (31), wherein the plug portion (33) protrudes from the storage portion (32), wherein the storage portion (32) is open on the side facing away from the pulling portion (31) and forms a notch (37), wherein when the plug portion (33) is inserted into the insertion space (45), an arm (44) engages into the notch (37) and thus extends into the storage portion (32) in order to delimit the at least one replacement blade (72); and wherein the number of the at least one grip recess (311) is two, wherein the two grip recesses (311) are provided on two opposite sides of the pulling portion (31).

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